GOODWIN AND HASKELL. — CONDUCTIVITY OF SOLUTIONS. 413 



HTDROCnLORIC ACID. 



First Method. Second Method. 



It will be seen that the results of the two methods of calculation agree 

 almost completely in the case of both acids. The equivalent conductiv- 

 ity for 0.25 milliuormal hydrochloric acid is 377.6, and for nitric acid 

 of the same strength is 374.4. The difference, 3.2, agrees well with 

 the difference, 3.6, between the conductivities of the CI and NO3 ions 

 as derived by Kohlrausch from measurements with neutral salts. It is 

 also of interest to note that the conductivity value extrapolated for 0.25 

 milliuormal hydrochloric acid from those between 0.005 and 0.137 

 normal under the assumption of the validity of the cube-root formula 

 (Afl — A^ = K Ci) is 381 or only about 0.9 per cent greater than our 

 corrected value. 



It remains only to apply the estimated correction of +2.5 units, dis- 



